Electric soldering-iron.



A. H. & G. P. WAAGE.

- ELECTRIC SOLDERING IRON.

APPLICATION FILED JAN. 28, 1910. 979.904.

Patented Dec. 27, 1910.

UNITED STATES PATENT OFFICE.

ALVIN n. WAAGE AND CLARENCE r. wiinen, or CHICAGO, ILLINOIS.

ELECTRIC SOLDERING-IRON.

Specification of Letters Patent.

Patented Dec. 27, 1910.

Application filed January 28, 1910. Serial No. 540,706;

To all whom it may/concern:

Be it known that We, ALVIN H. lVAAcE and CLARENCE P. VV AGE, citizens of the United States, residing in the city of Chicago, county of Cool and State of Illinois, have invented new and useful Improvements inv nishing tool, and the like.

One of the specific objects of our invention is to provide in a device of the character adverted to, a structure of interchangeable, readily accessible parts thatmay be quickly assembled and when so assembled to term a substantial, durable tool.

i kii'otherobject of our invention is to provide in a device of the character described a simple, interchangeable, heating element, or cartridge capable of being secured in place without the necessity of applying any stress or strain thereto to hold it in operative position, as when rotaryscrew-threaded parts are secured thereto.

Other and further objects of our invention will become readily apparent to persons skilled in the art from a consideration of the specification taken in conjunction with the drawings, wherein- Figure l an elevation of our device as applied to a soldering iron. Fig; 2 a central longitudinal cross section of the same. Fig. 3 is an enlarged central longitudinal section of the heating element; and Fig. t is a detail showing an insulating terminal plug by which the electric terminals of the device are supported.

In all of the views, the same reference numerals indicate similar parts.

In the specific embodimentillustrated, 5 is a. part to be heated, in this instance, a copper tip or point, having at its end the point. (3, and hollow, as at 7, )rovided with a depression of less diameter. coaxially there-- with and extending farther toward the point, said tip being screw-threaded interlorly, as

9 is a hollow handle of insulating inaterial, such as wood, rubber, or the like, pro

vided on its end with a metal. ferrule, 10, 9 diiclor 31, and asbestos in the groov 2% which is turned slightly over the end to prolike.

tect the end surface of the insulating structure thereof" The handle is perforated with axial bores of three diameters, as at 11, 12, and 13. d

An intermediate part composed of a metal tube, 14, is screw-threaded, as 15, and carries upon its end a screw-threaded metal bushing, 16, for immediatescrew-threaded engagement with the copper point, 5. .The portion, 14,'may be as long as desired. A metal cap, 1.6, is perforated as at 17, for the reception of the insulating terminal block, 18, and is screw-threaded, as at 19, for engagementwith the tube, 14.-. The block 18- is circular in form, as at 20, for insertion within thetubular portion of the cap 16, be-' ing held einplaced therein by the pin 21 which takes through a perforation, 22, made in the insulating terminal block, 18. This pinreceiving perforation is shown indicated in Fig. l, at right angles to the position that it is shown to occupy in Fig. 2. It, extends clear through the cylindrical part'of the cap, 16, and is readily removable when the cap is taken from the handle. The iiisulating terminal block 18 is longitudinally perforated, as at 23-23, on each side of the squared portion, for the reception of the terminal wires tliatengage the screws, 2% and 24-, which take through the reduced squared portions, 25, of the blocks 20, as clearly shown in Fig. 4, said screws aft'orch ing terminal connecting means for the terminals 3G-3($ of the connecting wires, 26, andthe terminals 3l33 of the heating element 2'7.

The heating element, 27, is composed of a (TOPP6F rod or core, 28, extending through one end of the coil, 30, surrounding it, and at the other end provided. with a circumit'orential groove, 2.), the purpose of which will hereinafter be described. The coil, 30, is made up of a series of convoliitions or turns of conducting wire, alternating in layers with strips of electric and heat. resisting material. such as asbestos paper, mica, or the A single sheet of highly refractory niaterial, such as sheets of mica or asbestos, :s wound'in the groove, 20, an electrical terminal wire 21 being placed over the paper so wound in the groove, and contact is made with the protruding end of: the wire composing the coil, 30. A layer, 32, of binding wire is then wound over the con-- so as to hold the terminal secure on the end-ct the copper rod, 28. After the coil has been entirely wound, in the manner described, the te'minal wire, is secured in the same manner over the end 29 ot the rod 28 by means of other binding wire.

The cartridge, 27, is made up of a series of layers of wire, consisting of a number of convolutions and after this a layer of thin insulating material, such as asbestos paper. The stem portion is made up of a series of turns of asbestos paper, which is, preterably, a continuation of the first few turns ofpaper that is wound on the cartridge 27 proper. Before the extension, 35, of the cartridge is completed, the terminal wires, 31 and 33, are laid adjacent the inner layers of paper and more paper is wound over them so as to completely embed said terminal wires in the insulated tube thus "formed. The

various layers of paper may be cemented to-' gether by suitable cement for the purpose of holding the same in compact form.

The end 28 of the copper core is placed in the depression, 8, of the tip, .3, and the extension, ot' the cartridge is passed through the tube 14-. The handle 0 is slipped oil of the threaded nipple or cap, it}, with which it has only frictional contact. 'The pin ll may be taken outof the nipple part 17 and the insulating block 20 and the terminal removed from the cap to. The terminal wires, 31 and 33, are then passed through the perforations, '23 and 23, and the ends. 31. and 33, respectively are passed around the contact screws, 2-l2. The handle is then inserted over the end of the duplex wire 26 and wire terminals 30 and 36 of the wire it; are bent around the screws, 2% and 2 1-,

and secured tightly thereto, thus completing the circuit through the cartridge or heating element of the device. the handle being then slipped into i 'rosition on the nipple or cap, in. lly this means a cartridge may be removed and a new one insiirted in the device in a vor v short time. and the parts may be reassembled without straining or in any way inyuriug or distorting the cartridge proper. If the end of the cartridge core were threaded or the tip 5 screwed onto the end of the threaded portion. an ol' ie iioimblej strain would be impressed upon the cartridge which would t nd to clip the wires 3.

and ii? and to disturb it not destroy the i vindings (it the cartridge proper. .ridfie may he tlllt'h'lj removed and other cartridge-s of dill'crcni resistanc may be pla ed in lieu thereof to render the device readily adaptable tor circuits of varying voltages.

\Vhat we claim is:

1. in a device of the character described,

The can i a heating element or cartridge comprising a coil of wire, a heating conducting core upon which said coil directly wound extending beyond the coil at one end for engagement with a part to be heateiil. a part to be heated provided with two bores, one for the coil and one for the core extension to make engagement therewith. a hollow handle, a pipe having a hollow enlarged end and connecting said handle and part to be heated, a termin: 1 block supported in said enlarged end and projecting tliereiron'i and over which the end of the handle is adapted to pass.

2. In a device of the character described. heating element or cartridge comprising a heat conducting core circumterentially grooved near one end, a coil surrounding said core leaving a part projecting at the other end. terminal wires overlying said groove and secured by transversely wound securing wires, andan extension from said coil comprising a series of turns of relatively thin sheet insulating material emb dding the terminal wires tlwrein.

2). In a' device of the character described, a hollow part to be heated. a heating i'element therein having an insulating extension consisting of a roll of ii'isulating sheet material integral with the insulation of said heating element, terminals of said heating element separated by layers and embedded within said roll, a tube through which said extension passes to the handle, an enlarged thimble orca p secured to the end of the tube, a perforated insulating terminal blocl' cured within said thimble and projectii'ig therefrom. terminal screws carried by said projecting part of said block. and a longitudinally perforated handle to receive the conducting cord, and adapted to make engagement with and inclose said thimble.

4'. In a device of the character described. a tube l thavint screw-threaded engagement with a c'opper tip, at one end and a cap. 145. larger than. said tube at the. other end. an insulating terminal block 18 projecting therefrom perforated. as at Q )-Q3, for terminal wires. Iii-33, said bloclt adapted for support in said cap and flattened, as at -35. and carrying terminal screws. zit- 24, and a handle. 5). perforated axially. as at 11 and 12 providing a shoulder thcrebetween. and adapted for frictional engagement with said cap and limited in ilsmovement by said shoulder.

l l l l i l l l 

